its a movie a couple of years old...but its of a knight or prince family being killed and he was suppose to be

[Confused]

dead from poison and he ended up on the shore of the enemy country where a woman found him, her father was the ruler she took care of him but couldnt tell him who she was she lied and said she was a maid. Anyway she was suppose to married the leader of the guys country which happen to be his close friend. They started sleeping around again cause they still love each other, while her father was planning on attacking the man she married. Eventually they got caught and she explained to her husband that she oved him and was with him before they got married....now can someone tell me whats the name of that movies?....and i cant remember who played the character it might have been kiera knightly